Electromagnetic signaling apparatus.



\ G.HENDERS0N ELECTROMAGNETIC SIGNALING APPARATUS.

APPLICATION FILED JAN-13,1916- 1,199,699. Patent-ed Sept. 26,1916.

a; ZNVENTUR.

'GEORGE HENDERSON, OF SOUTH PORCUPINE, ONTARIO, CANADA.

ELECTROMAGNETIC SIGNALING APPARATUS.

Specification of Letters Patent.

Patented Sept. 26, 1916.

Application filed January 13,1916. Serial No. 71,989.

naling' Apparatus, of which the following is a specification.

This invention relates to single stroke.

bells particularly adapted foruse in situations where it is exposed to dampness and moisture, and my object is to devise a reliable single stroke bell which will be absolutely waterproof, which will be as simple as possible, and which may be readily dismounted for examination and repairs withoutrequiring the removal of screws or other small parts. I

I attain my object by means of the constructions hereinafter described and illustrated in the accompanying drawings in which- Figure 1 is a front elevation of my improved bell; Fig. 2 a vertical section of the same; and Fig. 3 a plan view looking from the lower side.

' In the drawings like numerals of reference indicate corresponding parts in .the diflerent figures.

1 is a support for the gong and the electro-magnetic tapping device, which constitute the complete bell. This support is channel-shaped and is provided with the lugs 2 by means of which it may be secured to any suitable surface. This form of support will not collect or hold sludge or water, allowing anything dropping on it to pass freely by. l

The gong 3 is secured to the support by means of the bolt 4 passing through.the stem 5 and also through a slot 6 in the support. With this construction it is evident that by simply loosening the nut onthe bolt that the gong may be quickly removed or adjusted to and from the tapping device as may be desirable.

The coil 7 of the electro-magnetic tap ping device is wound on the brass sleeve 8 and is provided with the brass end disks 9 engaging the sleeve 8. The coil is iron clad, the casing'comprising the iron cylinder 10. and the caps 11 screwed on to the cylinder. The brass sleeve 8 passes through a hole in the lower cap 11, having a close fit therein. An iron sleeve 12 is formed integral with or conductively connected with the upper cap 11. This iron sleeve projects'upwardly from the cap and also inwardly within the brass sleeve 8, preferably about two-thirds of the way through the coil.

The leading-in wires to the coil pass through the bent conduit 21 secured to the side of the iron cylinder 10, its end being directed downwardly and provided with a screw cap 22 forming a stuffing box. All the connections of the coil are thus made completely watertight.

The coil isheld in position by means. of

the brackets 13. The upper bracket has a hole formed therein for the passage of the upper end of the iron sleeve 12, and the lower for the passage of the brass sleeve 8. These brackets are secured to the channel support .1 by single bolts. The bolt for one of these brackets at least, and preferably the lower, passes through a slot 14, hence when it is desired to remove the coil, it is simply necessary to loosen the nut of the bolt 15 and slide the bracket off the channel support. The coil with its jacket is then readily slipped out and subsequently replaced. I

The upper end of the iron sleeve 12 is coned as shown. Through the sleeve passes the tapper 16, preferably of brass, which tapper has its upper end 17 enlarged and undercut to fit the coned end of the sleeve 12. This makes a watertight joint which prevents water leaking through between the of the tapper,"it will be seen, projects a short distance below the lower end of the sleeve 12. The tapper 16 is actuated by the plunger l8,-which is short' as compared with the tapper 16 and of considerably greater diameter. Normally it is separated from the lower end of the tapper by a comparatively small air gap. The length of this gap maybe regulated by means of the screw 19, which is screwed-through a plug 20, forming a nut, suitably secured within the lower end of the brass sleeve .8.

From the construction-described, it will be seen that it is practically impossible for any moisture to get through between the tapper and .the iron sleeve in which it moves, and even if any moisture did find its way down .the sides of the tapper, the coil is effectively protected by thebrass sleeve 8.

This bell will be found to be very efl'ec from its lower end and an internal iron sleeve connected with the iron jacket and extending partway through the coil from its upper end; a tapper projecting from the coil and normally extending down within the sleeve aforesaid and projecting somewhat from the, lower end thereof; a plunger forming a core shorter and of greater diameter than the tapper separated normallyfrom the adjacent end of the tapper by a small air gap and adapted when the circuit of the coil is closed to strike and move said tapper; a nut carried by the lower end of the brass tube; and a screw threaded through said nut forming an adjustable back stop for the plunger.

2. In apparatus of the class described, the combination of a channel-shaped support; a bell provided with a stem bolted to the bottom member of the channel near one 40 ,channel support being arranged with a slot end; an inclosed electro-magnetic tapping device; two brackets bolted to the bottom member of'the channel and adapted to clasp the said tapping device between them, the bolt connection of one bracket with the to permit of the bracket being slid longitudinally of the channel when the nutof the bolt is loosened. I

3. In apparatus of the class described, the combination of a channel-shaped support; a bell provided with a stem bolted to the bottom member of the channel near one end; an inclosed electro-magnetic tapping device with a pro ecting portion at each end; two brackets bolted to the bottom member of the channel and adapted to clasp the said tapping device between them and having holes therethrough for the passage of the projecting portions of the tapping device, the bolt connection of one bracket with the channel support being arranged with a slot to permit of the bracket being slid 10ngitudinally of the channel when the nut of the bolt is loosened.

an iron cylinder; an iron sleeve integrally connected with one end cap projecting both outwardly therefrom and inwardly partway within the coil; a tapper movable within said sleeve and normally projecting below the lower end of the sleeve; and a plunger within the coil below the tapper.

5. In apparatus of the class described, the combination of an inductance coil; a casing therefor comprising iron caps with rims screwed externally on an iron cylinder; an iron sleeve integrally connected with one end cap projecting both outwardly therefrom and inwardly partway within the coil; a tapper movable within said sleeve and normally projecting below the lower end of the sleeve; a plunger within the coil below the tapper; and a brass sleeve within the coil and-exterior to the iron sleeve. forming a guide for the plunger.

6. In apparatus of the class described, the combination of an inductance coil; a casing therefor comprising iron caps screwed on an iron cylinder; an iron sleeve integrally connected with one end cap projecting both outwardly therefrom andinwardly partway within the coil; a tapper movable within said sleeve and normally projecting below the lower end of the sleeve; a plunger within the coil below the tapper;'a brass sleeve within the coil and exterior to the iron sleeve forminga guide for the plunger; a nut carried by the lower end of the brass tube; and ascrew threaded through said nut forming an adjustable back stop for the plunger.

7. In apparatus of the classdescribed, the combination of an iron clad inductance coil provided with an internal brass sleeve extending through the coil and projecting from its lower end and an internal iron sleeve projecting above the iron shell of the coil and extending down within the brass sleeve; a support; two brackets bolted to the support and adapted to clasp the said coil between them, the brackets having holes therein for the passage of the projecting ends of the brass sleeve and the iron sleeve. Signed at Dome Mines South Porcupine Canada this 4th day of January 1916, in the presence of the two undersigned witnesses.

GEORGE HENDERSON.

Witnesses: I

JOHN H. SLoAN, WILLIAM 'llINDALL. 

